Question

Which term of the A.P. $1,4,7,.....$ is $88$?

• A. 26
• B. 27
• C. 30
• D. 35

Answer 1

Answer: (C)

30

Let $a=1$

and $d=4-1=3$

We know:

$T_n=a+(n-1)d$

$\therefore 88=1+(n-1)3$

$\Rightarrow (n-1)=\frac{88-1}{3}=29$

$\therefore n=30$